Covalent functionalization of molybdenum disulfide by chemically activated diazonium salts

Abstract

Controlled covalent functionalization of MoS2 by chemical reduction.

Substrate Materials for Biomolecular Immobilization within Electrochemical Biosensors

“…Wang and co-workers demonstrate attachment of polyhistidine-tagged green fluorescent protein to MoS 2 by amide bond formation between the film and nitrilotriacetic acid (NTA) [154]. Methods to control aryldiazonium film thickness atop MoS 2 have been studied by several groups [157][158][159].…”

Fast Polymeric Functionalization Approach for the Covalent Coating of MoS2 Layers

“…This limited density issue has been recently faced by adding additional reducing agents such as KI, which promotes the massive reduction of aryl diazonium salts in solution leading to practically overall surface coverage. 22 A suitable alternative is the use of reactive molecules capable of promoting in situ polymerization on the 2D surface. Several examples, including polymerization on graphene through imine-based chemistry 23 and more recently in MoS2 using maleimides 16 and poly(N-vinylcarbazole) have been reported 24 These polymeric approaches ensure the presence of a dense coating in the final material, thus resolving the typically low degree of functionalization occurring in inert surfaces.…”

“…This surface density has been recently improved by the addition of supplementary reducing agents such as KI, which promotes the massive reduction of aryl diazonium salts in solution, leading to practically overall surface coverage. 23 A suitable alternative to promote considerably MoS 2 functionalization is the use of reactive molecules capable of fostering in situ polymerization. This polymeric approach leads to the formation of a dense coating in the final material, which results ideally in effectively implementing a desired functionality by selecting the appropriate functional monomer.…”

“…However, in the particular case of MoS 2 covalent functionalization based on diazonium, a limited density of attached molecules is often reached (∼11% coverage), which is marked by the number of molecules activated by CE-MoS2 as reducing agent. This surface density has been recently improved by the addition of supplementary reducing agents such as KI, which promotes the massive reduction of aryl diazonium salts in solution, leading to practically overall surface coverage . A suitable alternative to promote considerably MoS 2 functionalization is the use of reactive molecules capable of fostering in situ polymerization.…”

Tuning the magnetic properties of NiPS3 through organic-ion intercalation

“…One of the distinctive features that differentiate ultrathin LMMs from conventional bulk magnetic compounds is the tunability of their magnetic properties, which stems from their reduced dimensionality and electronic properties. While several recent studies show how the magnetic response of LMMs can be significantly altered through electrostatic gating, [5][6][7][8][9] the impact of chemical engineering approaches [10][11][12][13] remains much less explored.…”